TRIBE I. ASTR^ACEA, 
45 
j 
I thin, very finely denticulate, unequal: below very minutely radiato -striate, 
j and a little scabrous. 
Plate 18, fig. 1, outline of a vertical section, natural size. — Pacific Ocean, 
' and probably the Paumotu Archipelago. — Exp. Exp. 
\ 
3. PuNGiA GLANS {Dana). — Small, orbicular, high conoido-rotundate, 
inches broad and as much in height, below neatly concave ; very stout at mid- 
j die. Corallum with crowded lamellae, very finely denticulate : under surface 
very delicately striate and minutely scabrous. 
Plate 18, fig. 2, outline of a vertical section, natural size, 
4. Fungia discus {Dana). — Orbicular, a little undulate, on both sides 
nearly flat. Corallum with thin lamellae, unequal, denticulate, the interme- 
diate crenulate, then entire, and bearing a single obtuse tooth, and afterwards 
becoming one of the larger lamellae, and again crenulate or denticulate ; be- 
I low radiately lamello-striate and spinous, but about the middle, the striae ob- 
1 solete, and the spines acute and very minute. 
Plate 18, fig. 3, outline of lamellae, with the tentacular tooth. — Tahiti, So- 
I ciety Islands. — Exp. Exp. 
5. Fungia agariciformis {Lamarck). — Large, orbicular, either nearly flat 
or much convex, often a little undulate ; tentacles ^ of an inch long. Coral- 
lum with the lamellae finely denticulate, thin, unequal, tentacular tooth obso- 
lete ; below, lamello-striate, striae spinose, subequal, and about the centre, 
spines not in series, papilliform, minute, and sometimes obsolescent. 
Plate 18, fig. 5, outline of a lamella, above and below. — The East Indies. 
Singapore and Sooloo Sea, Exp. Exp . — Red Sea, Forskal. 
Var. tenuifolia^ from Tahiti. — PI. 18, fig. 6. 
6. Fungia dentata {Dana). — Large, often hemispherical, and deeply con- 
cave below. Corallum with unequal lamellae, unevenly dentate ; teeth small 
and subacute, with usually acute intervals ; below, coarsely and every where 
equally crowded echinate, the spines, in adult specimens, often acervate, and 
nearly 2 lines long, over the middle scarcely smaller, and not radiate. 
Plate 18, fig. 7, outline of a lamella, above and below, showing a profile of 
a section of the corallum. — East Indies, — Exp. Exp. 
7. Fungia echinata {Esper,) Dana. — Large, orbiculate, often undulate, 
and sometimes convex; umber-colored, tentacles bursiform, whitish, scarcely 
3 lines long. Corallum with unequal lamellce, inciso-dentate ; teeth oblong, 
irregular, often compound ; below, remotely lamello-radiate and coarsely echi- 
nate, with other smaller spines intermediate, partly seriate. 
Plate 18, fig. 9, the animal expanded; 9a, a tentacle enlarged, with the ani- 
mal integument broken through, as often happens, over the points or teeth of 
the lamellae ; 9 6, profile section of the corallum, showing outline of lamella ; 
fig. 8, the same of another variety. — E. Indies, and the Feejees. — Exp. Exp. 
